Bally part identification

[Steve Broad]

Hi


Can anyone identify this knob/dial from my Bally 742/820 type machine? Can't find it in the manuals I have.


Thanks
Steve

[rdaniel]

Looks to me to be a timer of some sort. Perhaps to cut off the machine in case of a runaway hopper.

[DavidLee]

Best to follow the wires for a better understanding of why this control was installed.
If possible post a photo of where the wires lead to.

[Steve Broad]

I will have a look at the wiring when I get back home. In the meantime, here is a video of the dial/knob in action :-)

https://www.youtube.com/watch?v=9PPYYt0nbiQ

[slcjeeper]

It appears to possibly limit the amount of time the player has to play a game after giving the machine a credit. Regardless, it’s not original to the machine. If it was mine, I’d cut it out.

[Paul]

Could also be for a bonus system.

[mark the spark]

random hold after win?

[Steve Broad]

Cheers guys. I guess that it could be any of these :-) With regard to a play timeout that is easy to check and I will do that tomorrow. With regard to removing it, Ooooo scary :-) As the machine seems to work OK, apart from one of the wiper arms being out of alignment it now works well, I am loath to start cutting bits off :-)

[mark the spark]

im sure it is a hold after win these were fitted to conform to gambling laws at the time
they offer a hold after a win the smallest cam is the hold after win cam
you wont find a schematic for the coin changers or if you do send me a copy
there are lots of these about but you wont find much info on them apart from they are mostly 742a and have had changers added

[wolftalk]

there are lots of these about but you wont find much info on them apart from they are mostly 742a and have had changers added

afaik, no 742a machine had the hold-n-draw hardware and things like the base plate under the reels wouldn't be compatible with the bally hold-n-draw parts.    The 802 was the first model to have hold-n-draw.


I guess you could make any EM reel mech work with enough part swaps or a non-bally way of preventing a reel from spinning tho. 


how would a hold after win work?  Holding a single cherry makes sense, but letting someone hold all three reels would seem crazy - you could hold a jackpot win and get paid twice?

[mark the spark]

next time im in the workshop i will have a look at the id plate on mine i have 2 machines that are hold and draw
both fitted with the timer cam they can slightly vary in cams but serve the same function
as for hold a jackpot win yes you can but remember the jackpot will be a mighty £1.00 or £1.50

[Steve Broad]

next time im in the workshop i will have a look at the id plate on mine i have 2 machines that are hold and draw
both fitted with the timer cam they can slightly vary in cams but serve the same function
as for hold a jackpot win yes you can but remember the jackpot will be a mighty £1.00 or £1.50

My Jackpot is 50p :-)


Is there any way of increasing the frequency of the hold coming up? Also, what does draw mean?


Regards
Steve

[wolftalk]

hold = the reels that don't spin
draw = the reels that do spin

the buttons let you choose for each reel.  I guess the terminology came from card games.


from mark's description, the hold happens when a switch stack is operated by a cam.  if there's multiple cams in your gadget, then moving the stack to a cam that operates the stack more often is what ya want.


if you want to invert the probability, rebuild the switch stack to the switch that matters changes type.  i.e.. if you need a switch to close by being lifted by a cam to enable hold, rebuild the stack so the switch opens when lifted by the same cam.

[Steve Broad]

hold = the reels that don't spin
draw = the reels that do spin

the buttons let you choose for each reel.  I guess the terminology came from card games.


from mark's description, the hold happens when a switch stack is operated by a cam.  if there's multiple cams in your gadget, then moving the stack to a cam that operates the stack more often is what ya want.


if you want to invert the probability, rebuild the switch stack to the switch that matters changes type.  i.e.. if you need a switch to close by being lifted by a cam to enable hold, rebuild the stack so the switch opens when lifted by the same cam.

Ah, as simple as that :-)


Once I have the damn thing working properly I will investigate the cam, thanks Paul


Regards
Steve

[Steve Broad]

next time im in the workshop i will have a look at the id plate on mine i have 2 machines that are hold and draw
both fitted with the timer cam they can slightly vary in cams but serve the same function
as for hold a jackpot win yes you can but remember the jackpot will be a mighty £1.00 or £1.50

Great, thanks.
Steve